Anhydrous Borax
Fused Borax, Sodium Tetraborate
Chemistry
|
Links to Other Materials
- Borax - Parent
- Borax Pentahydrate - Related
- Boric Acid - Related
- Borax Decahydrate - Related
- Cache
Miscellaneous
- Family: Flux Source
- Region: None
- Mined At: Unspecified
- Raw Mineral: No
- Generic: Yes
Notes
Na2B4O7
CAS/TSCA Number 1330-43-4
A highly concentrated source of boric oxide for glazes. Anhydrous borax is made by burning or fusing hydrated borax. It thus contains little or no water of crystallization (conversation ratio of .53 compared to hydrated borax) and does not rehydrate under normal storage conditions. Anhydrous borax is water soluble, but considerably less so than raw borax (in aqueous solution it can provide slow release of boron).
Anhydrous borax is an excellent glass former. It does not puff or swell during melting thus fewer production problems result (i.e. powder being blown away in drafty kilns, no insulation factor during heatup due to the porous stage, less bulk, less fuel).
This material is used as a source of B2O3 in the manufacture of many different types of borosilicate glass, including heat and chemical resistant glasses, illumination glasses, optical lenses, medical and cosmetic containers, hollow microspheres and glass beads. It has a higher bulk density and melts more rapidly than raw forms of borax. It also provides a source of sodium.
Data
- Melting Point (MP): 742C
- Specific Gravity: 2.36
- Melting Point (MP): 742C
- Specific Gravity: 2.36
URLs
- Dehybor Data Sheet - http://www.borax.com/pdfs/dist/Profile_Dehybor_Anhydrous_Borax.pdf
Suppliers
- American Borate Co
- ETI Holding A.S.
- Etimine USA
- Generic
- Rio Tinto Borax
Authors
- Tony Hansen (Owner)
XML
<?xml version="1.0" encoding="UTF-8"?>
<material name="Anhydrous Borax" descrip="Fused Borax, Sodium Tetraborate" generic="1" rawmineral="0" searchkey="Calcined Borax, Dehydrated Borax, Pyrobor" loi="0.00">
<families>
<family name="Flux Source"/>
</families>
<oxides>
<oxide symbol="Na2O" name="Sodium Oxide, Soda" status="U" percent="30.820" tolerance=""/>
<oxide symbol="B2O3" name="Boric Oxide" status="" percent="69.190" tolerance=""/>
</oxides>
<references>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
<reference name="seealso" reason=""/>
</references>
<suppliers>
<supplier name="American Borate Co" country="US" url="admin@amborate.com" label=""/>
<supplier name="ETI Holding A.S." country="TR" url="http://www.etimine.com/" label=""/>
<supplier name="Etimine USA" country="US" url="http://www.etimineusa.com/" label=""/>
<supplier name="Generic" country="" url="" label=""/>
<supplier name="Rio Tinto Borax" country="US" url="http://www.borax.com" label=""/>
</suppliers>
<notes>
<note>Na2B4O7
CAS/TSCA Number 1330-43-4
A highly concentrated source of boric oxide for glazes. Anhydrous borax is made by burning or fusing hydrated borax. It thus contains little or no water of crystallization (conversation ratio of .53 compared to hydrated borax) and does not rehydrate under normal storage conditions. Anhydrous borax is water soluble, but considerably less so than raw borax (in aqueous solution it can provide slow release of boron).
Anhydrous borax is an excellent glass former. It does not puff or swell during melting thus fewer production problems result (i.e. powder being blown away in drafty kilns, no insulation factor during heatup due to the porous stage, less bulk, less fuel).
This material is used as a source of B2O3 in the manufacture of many different types of borosilicate glass, including heat and chemical resistant glasses, illumination glasses, optical lenses, medical and cosmetic containers, hollow microspheres and glass beads. It has a higher bulk density and melts more rapidly than raw forms of borax. It also provides a source of sodium.</note>
</notes>
<testdata>
<testitem testname="4" value="742C"/>
<testitem testname="4" value="2.36"/>
<testitem testname="4" value="742C"/>
<testitem testname="4" value="2.36"/>
</testdata>
</material>
Much more information with complete interlinking to many related Copyright 2003 http://digitalfire.com, All Rights Reserved Please support http://ceramicmaterials.info to improve this library |  |
INSIGHT is ceramic chemistry |